Infineon Technologies (Korea CEO Seung-soo Lee) has launched a new MERUS™ audio amplifier that is upgraded from the previous generation product with a 50% smaller footprint and without a conventional heatsink.

Infineon announced on the 3rd that it is launching the MA5332MS, a MERUS™ 2-channel analog input Class D audio amplifier multichip module (MCM), utilizing its superior power MOSFET technology.

Significantly upgraded from the previous generation, the MA5332MS provides the same or higher output as monolithic solutions with a 50% smaller footprint and no heatsink.

The MA5332MS, providing 100W to 400W per channel, is ideal for consumer products such as home theater boxes, soundbars, subwoofers, and mini component systems.

In addition, it is suitable for professional applications such as active speakers, active studio monitors, guitar amplifiers, the automotive aftermarket, and marine audio amplifiers.

The MA5332MS features a dual-channel PWM controller, a high-voltage gate driver, and four low RDS(on) MOSFETs in a compact 7mm x 7mm 42-pin QFN package. It has been integrated. Since the Class D output stage RDS (on) (24.4 mΩ typ.) is very low, it can provide 2x100W @ 4Ω without a heatsink, and 2x200W @ 4Ω with a small 8°C/W heatsink.

Therefore, the size can be significantly reduced compared to other single-chip solutions.

Additionally, the MA5332MS allows for various output configurations, such as single-ended (2x SE), bridge-connected load (BTL), and parallel single-ended (PSE), to differential or single-ended (SE) inputs using single or split power supplies. Since the SE topology can be used instead of BTL, bus capacitors and output low-pass filters can be reduced.

The highly integrated multi-chip module MA5332MS includes protection circuitry for overcurrent, overheating, undervoltage protection, and self-reset functions. Thanks to this on-chip protection circuitry, there is no need to design protection circuits using external components. Furthermore, new internal logic for soft-start operation control reduces click and pop noise. With these enhanced features, the MA5332MS reduces BOM costs and thermal management issues, providing room for industrial designs and achieving excellent efficiency and low output distortion.

The MERUS Class D audio amplifier multichip module MA5332MS is available in a PG-IQFN-42 package and is currently accepting orders. Additional information can be found on the MA5332MS and Class D Audio Amplifier IC website.